CN111964460B

CN111964460B - Cement clinker grate type particle grading cooler

Info

Publication number: CN111964460B
Application number: CN202010884324.1A
Authority: CN
Inventors: 徐杰
Original assignee: Feixian Yizhou Cement Co ltd
Current assignee: Feixian Yizhou Cement Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-04-20
Anticipated expiration: 2040-08-28
Also published as: CN111964460A

Abstract

The invention relates to the field of coolers, in particular to a cement clinker grate type particle grading cooler which comprises a top layer cooling area, wherein the bottom of the top layer cooling area is provided with a fixed sieve plate and a movable sieve plate, the movable sieve plate is attached to the fixed sieve plate and is provided with a plurality of sieve pores in a one-to-one correspondence manner, the movable sieve plate circularly reciprocates along the inclined direction of a plate body to ensure that the sieve pores of each layer are overlapped and staggered in a circulating and reciprocating manner, a first air passage is arranged inside the movable sieve plate, and the air outlet end of the first air passage is positioned on the inner wall of each sieve pore and; the bottom of the middle-layer cooling area is provided with a plurality of roll shafts rotating in the same direction in parallel along the horizontal direction, a second air passage is arranged inside each roll shaft, and the second air passage is provided with a plurality of air outlet holes. The invention can effectively improve the heat exchange efficiency, can reduce the resistance of gas circulation by separating materials with different particle sizes, and can ensure that cooling gas simultaneously participates in the material conveying process in the working process, thereby effectively improving the gas use efficiency.

Description

Cement clinker grate type particle grading cooler

Technical Field

The invention relates to the field of coolers, in particular to a cement clinker grate type particle grading cooler.

Background

The cooler is a cooling device commonly used in a cement burning system, and mainly adopts a horizontal cooler in the industry at present, but the existing horizontal cooler carries out heat exchange between airflow and solids through local countercurrent heat exchange, so that the heat exchange efficiency is low, and the production cost is difficult to reduce.

In view of the above-mentioned existing defects, the inventor of the present invention has made a study and innovation based on the practical experience and professional knowledge of the product design and manufacture for many years and with the application of the theory, in order to create a grate type particle grading cooler for cement clinker, which is more practical.

Disclosure of Invention

The invention provides a cement clinker grate type particle grading cooler which effectively improves the heat exchange efficiency, thereby solving the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a cement clinker grate type particle grading cooler comprises:

the top layer cooling area is connected with the rotary kiln and the air pipe, a fixed sieve plate and a movable sieve plate are arranged at the bottom of the top layer cooling area, the movable sieve plate and the fixed sieve plate are arranged in a laminating mode, a plurality of sieve holes are arranged in a one-to-one correspondence mode, the movable sieve plate and the fixed sieve plate are inclined downwards in the direction far away from the rotation direction, the movable sieve plate moves in a circulating reciprocating mode along the inclined direction of the plate body, and therefore the sieve holes in each layer are overlapped and staggered in a circulating reciprocating mode;

the middle-layer cooling area is positioned below the top-layer cooling area, a plurality of roll shafts rotating in the same direction are arranged at the bottom of the middle-layer cooling area in parallel along the horizontal direction, and a material passing gap is formed between every two adjacent roll shafts, wherein a second air passage is arranged inside each roll shaft, a plurality of rows of air outlet holes of the second air passages are uniformly distributed around the axis of each roll shaft, and each row comprises a plurality of uniformly distributed air outlet holes;

a first hopper is arranged below the tail end of the fixed sieve plate in the conveying direction; and a second hopper is arranged below the tail end of the conveying direction of each roll shaft, and a third hopper is arranged at the bottom of a feeding gap between the roll shafts.

Further, the axes of the screen holes are arranged along the longitudinal direction.

Furthermore, the air outlet ends are uniformly distributed with at least four air outlet ends along the axis of the sieve holes.

Further, be provided with the polytetrafluoroethylene layer between fixed sieve board and the removal sieve board, the polytetrafluoroethylene layer with fixed sieve board and/or removal sieve fixed connection.

Furthermore, a crushing device is arranged above the first hopper and used for crushing falling materials.

Furthermore, a crushing device is arranged above the second hopper and used for crushing falling materials.

Further, the bottom of each roll shaft forms a bottom cooling area, and the bottom cooling area is provided with at least one cooling air inlet.

The material blocking device comprises a roller shaft, a first blocking plate and a second blocking plate, wherein the roller shaft is arranged on the outer side of the roller shaft, the first blocking plate is arranged on one side of the tail end of the roller shaft, and the second blocking plate is arranged on one side of a fixed sieve plate and used for blocking the material from the fixed sieve plate.

Further, the bottoms of the first barrier plate and the second barrier plate are arranged at intervals with the bottom of the cooler, and the other side, opposite to the first barrier plate, of the second barrier plate is provided with a circulation channel.

Furthermore, a plurality of baffles are arranged in parallel in the flow channel, and the baffles are obliquely arranged relative to the longitudinal direction.

Through the technical scheme of the invention, the following technical effects can be realized:

the cement clinker grate type particle grading cooler can effectively improve the heat exchange efficiency, can reduce the resistance of gas circulation by separating materials with different particle diameters, enables cooling gas to participate in the material conveying process simultaneously in the working process, improves the use efficiency, and finally enables the gas to move upwards through the gaps at the edges of the top layer cooling area and the middle layer cooling area so as to be discharged from the air pipe for subsequent utilization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a grate type particle grading cooler for cement clinker;

fig. 2 is a schematic view of the positional relationship of a fixed screen deck and a moving screen deck;

figure 3 is a partial cross-sectional view of a moving screen deck;

fig. 4 is a schematic view of gas flow when the screen holes of the moving screen plate and the fixed screen plate correspond to each other;

fig. 5 is a schematic view of gas flow when the screen holes of the moving screen plate and the fixed screen plate are staggered;

FIG. 6 is a schematic view of the structure and a partial enlargement of the roller shaft;

FIG. 7 is a schematic view of the rotation of the roller shaft and the direction of gas flow;

FIG. 8 is a schematic view of the structure of the grate type particle grading cooler for cement clinker in FIG. 1;

reference numerals: 1. a top layer cooling zone; 11. fixing the sieve plate; 12. moving the sieve plate; 121. a first air passage; 122. an air outlet end; 2. a rotary kiln; 3. an air duct; 4. a middle layer cooling zone; 5. a roll shaft; 51. a second air passage; 52. an air outlet; 6. a crushing device; 7. a first hopper; 8. a second hopper; 9. a third hopper; 10. a cooling air inlet; 13. a first barrier plate; 14. a second barrier panel; 15. a fourth hopper; 16. and a baffle plate.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.

As shown in fig. 1 to 7, a grate type particle grading cooler for cement clinker comprises: the top cooling area 1 is connected with the rotary kiln 2 and the air pipe 3, a fixed sieve plate 11 and a movable sieve plate 12 are arranged at the bottom of the top cooling area 1, the movable sieve plate 12 and the fixed sieve plate 11 are arranged in a laminating mode and are provided with a plurality of sieve pores in a one-to-one correspondence mode, the movable sieve plate 12 inclines downwards in the direction far away from rotation, the movable sieve plate 12 moves in a circulating reciprocating mode along the inclination direction of a plate body, and therefore superposition and dislocation of each layer of sieve pores are achieved in a circulating reciprocating mode, a first air channel 121 is arranged inside the movable sieve plate 12, and an air outlet end 122 of the first air channel 121 is located on; the middle-layer cooling area 4 is positioned below the top-layer cooling area 1, a plurality of roll shafts 5 rotating in the same direction are arranged at the bottom of the middle-layer cooling area in parallel along the horizontal direction, and a material passing gap is formed between every two adjacent roll shafts 5, wherein a second air passage 51 is arranged inside each roll shaft 5, a plurality of rows of air outlet holes 52 of the second air passages 51 are uniformly distributed around the axis of each roll shaft 5, and each row comprises a plurality of uniformly distributed air outlet holes; a first hopper 7 is arranged below the tail end of the fixed sieve plate 11 in the conveying direction; a second hopper 8 is arranged below the tail end of each roller shaft 5 in the conveying direction, and a third hopper 9 is arranged at the bottom of a feeding gap between the roller shafts 5.

The invention provides a novel cement clinker grate type particle grading cooler, which adopts the following working method in the working process:

s1: the material falls to the top of the fixed sieve plate 11 from the rotary kiln 2, the movement of the movable sieve plate 12 is controlled, and the continuous air supply of the first air duct 121 inside is ensured, when the movable sieve plate 12 moves to send air into the sieve pores on the fixed sieve plate 11, as shown in fig. 4, the material is cooled on one hand under the action of wind force, and on the other hand, the large-particle material tends to move downwards along the inclined direction of the fixed sieve plate 11, meanwhile, in the movement process, the material below the medium particles falls to the positions between the roll shafts 5 from the sieve pores overlapped with the upper layer and the lower layer, and the large-particle material enters the first hopper 7; when the movable sieve plate 12 moves to blow air to the bottom surface of the fixed sieve plate 11, that is, the wind cannot penetrate through the fixed sieve plate 11, as shown in fig. 5, the wind is reflected and enters the middle-layer cooling area 4 to perform cooling operation;

s2: during the movement of the roller shafts 5, a part of smaller particles fall from the material passing gap, and certainly, the material is crushed by the two roller shafts 5 in the process, and the material which cannot fall from the material passing gap is conveyed forwards by each roller shaft 5 and falls to the second hopper 8, during the process, the material is cooled under the action of wind power from the air outlet 52, and the wind power can also loosen the materials with different particle sizes, so that the separation is more convenient, the resistance of upward movement of gas can be effectively reduced by the separation of the materials with different particle sizes, and during the process, the gas from the gas outlet 122 can also participate in the cooling work of the middle-layer cooling area 4 at intervals, so that the utilization rate is improved; the materials with smaller particle sizes enter the third hopper 9, so that the effective separation of the materials with different particle sizes is effectively realized.

In step S2, because the roller shaft 5 tends to convey the material forward, the air flowing out of the air outlet 52 will generate a certain resistance to the material during the rotation of the roller shaft 5, and the heat exchange efficiency can be improved by the reverse heat exchange, as shown in fig. 7.

The cement clinker grate type particle grading cooler in the embodiment of the invention can effectively improve the heat exchange efficiency, can reduce the resistance of gas circulation by separating materials with different particle diameters, enables cooling gas to participate in the material conveying process simultaneously in the working process, improves the use efficiency, and finally enables the gas to move upwards through the gaps at the edges of the top layer cooling area 1 and the middle layer cooling area 4, so that the gas is discharged from the air pipe 3 for subsequent utilization.

Wherein, the axis of sieve mesh is along vertical setting to improve the effect degree to the material, help making the material obtain the motion trend more, thereby help the separation of different particle diameter materials more. In order to improve the use effect, the number of the air outlet ends 122 is at least four along the axis of the sieve holes.

Preferably, a polytetrafluoroethylene layer is arranged between the fixed sieve plate 11 and the movable sieve plate 12, and the polytetrafluoroethylene layer is fixedly connected with the fixed sieve plate 11 and/or the movable sieve plate 12. The smoothness of the relative motion of the fixed sieve plate 11 and the movable sieve plate 12 can be effectively improved through the self-lubricating effect of the polytetrafluoroethylene layer, and the resistance in the working process is reduced, wherein the motion of the movable sieve plate 12 is linear circular reciprocating motion, so that the forms of power combination of a linear cylinder, a motor and a cam and the like can be adopted.

Above the first hopper 7, a crushing device 6 is arranged for crushing the falling material in order to control the final material particle size. It is also preferred that above the second hopper 8 a crushing device 6 is arranged for crushing the falling material.

In the above preferred embodiment, the material is crushed to the required particle size by the crushing device 6, the specific requirement is realized by controlling the crushing device 6, and the material above the third hopper 9 can be controlled by adjusting the gap between two adjacent roller shafts 5.

Preferably, as for the above embodiment, the bottom of each roller shaft 5 forms a bottom cooling area, the bottom cooling area is provided with at least one cooling air inlet 10, a small part of cooling air entering from the bottom cooling area passes through the space between the roller shaft 5 and the screen holes, and the other part of cooling air moves upwards through the gap at the edge of the top layer cooling area 1 and the middle layer cooling area 4, and can participate in the cooling of materials with different particle sizes from small to large in sequence, thereby improving the cooling effect.

In order to further improve the separation effect of each particle size and enable cooling gas to better participate in cooling at each stage, the separator further comprises a separator combination, the separator combination comprises a first separation plate 13 arranged on one side of the tail end of each roller shaft 5 and used for transversely blocking the materials from the roller shafts 5, and a second separation plate 14 arranged on one side of the fixed sieve plate 11 and used for blocking the materials from the fixed sieve plate 11.

As shown in fig. 8, the first blocking plate 13 and the second blocking plate 14 are arranged, so that a certain blocking effect is formed between different cooling areas, the longitudinal circulation of cooling gas is improved, the cooling efficiency is improved, and materials with different particle sizes can be better separated.

Preferably, the bottoms of the first barrier plate 13 and the second barrier plate 14 are spaced from the bottom of the cooler, and the other side of the second barrier plate 14 opposite to the first barrier plate 13 is provided with a flow passage, that is, the right side area of the second barrier plate 14 in fig. 8; the cooling air entering through the cooling air inlet 10 can effectively cool the materials reaching the bottom layer, although part of the cooling air can enter the middle-layer cooling area 4 and the top-layer cooling area 1, the movement of each area is hindered to some extent, so that the part of the air force can enter an unobstructed free settling area through a flow channel through a gap at the bottom of the first barrier plate 13 and the second barrier plate 14, and the materials with finer particle diameters in the area are cooled and then settle and can enter the fourth hopper 15 at the bottom.

In order to further improve the sedimentation, a plurality of baffles 16 are arranged in parallel in the flow channel, the baffles 16 are arranged obliquely relative to the longitudinal direction, the inclination can be towards the left side or the right side in the figure, but in order to reduce the wind resistance, the baffles are preferably inclined towards the left side in the figure to block materials with finer grain diameters, and the sedimentation effect is improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A cement clinker grate type particle grading cooling machine is characterized by comprising:

the top layer cooling area (1) is connected with the rotary kiln (2) and the air pipe (3), a fixed sieve plate (11) and a movable sieve plate (12) are arranged at the bottom of the top layer cooling area (1), the movable sieve plate (12) is attached to the fixed sieve plate (11), a plurality of sieve holes are arranged in one-to-one correspondence, the fixed sieve plate and the movable sieve plate incline downwards in the direction away from the rotary kiln (2), the movable sieve plate (12) circularly reciprocates along the inclined direction of a plate body, so that superposition and dislocation of the sieve holes of each layer are realized in a circular reciprocating mode, a first air channel (121) is arranged inside the movable sieve plate (12), and an air outlet end (122) of the first air channel (121) is located on the inner wall of the sieve holes and supplies air towards the fixed sieve plate (; the middle-layer cooling area (4) is positioned below the top-layer cooling area (1), a plurality of roll shafts (5) rotating in the same direction are arranged at the bottom in parallel along the horizontal direction, a material passing gap is formed between every two adjacent roll shafts (5), a second air passage (51) is arranged inside each roll shaft (5), a plurality of rows of air outlet holes (52) of the second air passages (51) are uniformly distributed around the axis of each roll shaft (5), and each row comprises a plurality of uniformly distributed air outlet holes; a first hopper (7) is arranged below the tail end of the fixed sieve plate (11) in the conveying direction; and a second hopper (8) is arranged below the tail end of each roller shaft (5) in the conveying direction, and a third hopper (9) is arranged at the bottom of a feeding gap between the roller shafts (5).

2. A cement clinker grate particle classifying cooler according to claim 1, wherein the axes of the screen holes are arranged in a longitudinal direction.

3. The cement clinker grate grain cooler of claim 2 wherein the air outlet ends (122) are evenly distributed along the axis of the screen holes in at least four numbers.

4. Cement clinker grate type particle classifying cooler according to claim 1, characterized in that a polytetrafluoroethylene layer is arranged between the fixed screen deck (11) and the moving screen deck (12), said polytetrafluoroethylene layer being fixedly connected with the fixed screen deck (11) and/or the moving screen deck (12).

5. A cement clinker grate particle classifying cooler according to claim 1, characterized in that a crushing device (6) is arranged above the first hopper (7) for crushing falling material.

6. Cement clinker grate grain cooler according to claim 5, characterized in that above the second hopper (8) there is arranged a crushing device (6) for crushing the falling material.

7. A cement clinker grate particle classifying cooler according to any of claims 1 to 6, characterized in that the bottom of each roll shaft (5) forms a bottom cooling zone, which is provided with at least one cooling air inlet (10).

8. A cement clinker grate particle staged cooler according to claim 7, characterized by further comprising a baffle combination comprising a first baffle plate (13) arranged on the side of the end of each of said rollers (5) for laterally blocking material from said rollers (5), and a second baffle plate (14) arranged on the side of the stationary screen plate (11) for blocking material from said stationary screen plate (11).

9. The cement clinker grate grain cooler according to claim 8, characterized in that the bottom of the first and second baffle plates (13, 14) are spaced from the cooler bottom and that the side of the second baffle plate (14) remote from the first baffle plate (13) is provided with a flow channel.

10. Cement clinker grate grain cooler according to claim 9, characterized in that several baffles (16) are arranged in parallel and side by side in the flow channel, which baffles (16) are arranged obliquely with respect to the longitudinal direction.